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Commit e6c9dec3 authored by Kamil Debski's avatar Kamil Debski Committed by Mauro Carvalho Chehab
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[media] s5p-mfc: set allow_zero_bytesused flag for vb2_queue_init 



The s5p-mfc driver interprets a buffer with bytesused equal to 0 as a
special case indicating end-of-stream. After vb2: fix bytesused == 0
handling (8a75ffb8) patch videobuf2 modified the value of bytesused if it
was 0. The allow_zero_bytesused flag was added to videobuf2 to keep
backward compatibility.

Signed-off-by: default avatarKamil Debski <k.debski@samsung.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent e4af23d3

drivers/media/platform/s5p-mfc/s5p_mfc.c

+7 −0
Original line number Diff line number Diff line
@@ -843,6 +843,13 @@ static int s5p_mfc_open(struct file *file) 
		ret = -ENOENT;

		goto err_queue_init;

	}

	/* One way to indicate end-of-stream for MFC is to set the

	 * bytesused == 0. However by default videobuf2 handles bytesused

	 * equal to 0 as a special case and changes its value to the size

	 * of the buffer. Set the allow_zero_bytesused flag so that videobuf2

	 * will keep the value of bytesused intact.

	 */

	q->allow_zero_bytesused = 1;

	q->mem_ops = &vb2_dma_contig_memops;

	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;

	ret = vb2_queue_init(q);